/Engine/Source/Runtime/Slate/Public/Widgets/Input/SSpinBox.h
Notification when the max/min spinner values are changed (only apply if SupportDynamicSliderMaxValue or SupportDynamicSliderMinValue are true)
typedef TBaseDelegate_FourParams< void, NumericType, [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) >, bool, bool > FOnDynamicSliderMinMaxValueChanged